SCHEDULE 3
PART II
Conditions and requirements to be observed18
When a train either occupies a track circuit or operates a treadle the sequence of events to close the crossing to road traffic shall automatically begin. The sequence shall be:
a
The amber lights shall show and the audible warning shall begin. The lights shall show for approximately 3 seconds.
b
Immediately the amber lights are extinguished the intermittent red lights shall show.
Not less than 27 seconds shall elapse between the time the amber lights first show and the time when the train may be expected to reach the crossing. The intermittent red lights and the audible warning shall stop as soon as the train has passed clear of the crossing.